@densho
Quote:
densho wrote:I've been playing with screenmode settings lately too, but unable to pinpoint where the bottleneck is.
Got LG 38UC99-W ultrawide monitor which is capable of 3840x1600 resolution. This works fine with displayport and pc.
On X5000 I'm unable to get the full resolution with HDMI. When modes are queried with DDCMODE=ALL it lists all possible modes, including 3840x1600. When testing this resolution with screenmode prefs screen stays black until I hit esc. 3440x1440 resolution is fine.
Monitor is capable of hdmi v2.0 and cable is high speed certified. Radeon R9 280X has HDMI 1.4 which should be able to display even 4k at 30hz?
Is it possible to define screenmodes which have different refresh rates, ie 3840x1600@30hz and all other modes smaller than this @60hz?
No matter what modes I input to devs/monitors/radeon tooltypes, only the default modes are displayed in the screenmode prefs. Even if it's only tooltype 3840x1600@30hz (yes, DCC is disabled in this case).
For some reason 3840x1600 is always reported 61hz in the screenmode prefs.
i have also a monior with that resolution (eizo) and a RX550 (sapphire)
it shows the screenmode with 30hz and 60hz.
30hz is working, but - honestly - not usable. mouse jumping at 30hz is really ugly!
60hz is not working. i already was in contact with hans about this and we found out that this seems to be a problem of the ROM code of the card.
when trying to use such a resolution i get on the serial output smth like:
>> RadeonRX (0): atombios stuck in loop for more than 5secs aborting
>> RadeonRX (0): atombios stuck executing D614 (len 824, WS 0, PS 0) @
>> 0xD763
>> RadeonRX (0): atombios stuck executing D4CE (len 326, WS 0, PS 0) @
>> 0xD56A
and only a black screen. i tried the card on our windows machine (with the normal windows built-in-driver) and it works like a charm in that resolution.
do you get a similar output?
i also tried another RX550 (yeston) with the same result
i'm a bit disappointed that this resolution is not working.
as proposed by hans i wanted to create a bugreport on A-EON's bug tracker. but until today i was not able to get a user there. i started trying in september last year...
btw... i'm now using a resolution of 2560x1600@60 which is working fine. but have black borders on the left + right. seems i need to live with that
regards...
michael